| Summary: | 碩士 === 國立臺灣師範大學 === 化學研究所 === 88 === The purpose of this study was to unravel problem-solving strategies, problem-solving activities and the difficulties for novice science major students in the process of solving stereochemistry of coordination compounds problems. The study was divided into two parts, the first part aimed to explore the correlation between spatial perception ability and stereochemistry problem solving ability; the second part was to analyze the science majors'' inner process through the protocol analysis collected from thinking-aloud and interview Methods.
The 45 subjects in this study took paper and pencil tests on ability of spatial perception and solving stereochemistry problem, and seven of the students (two high-school, three freshmen science major and two sophomores) solved the stereochemistry problems with thinking-aloud method and were videotaped. After the analysis of the problem-solving process, the researcher discussed the differences of behaviors, activities, and process in solving stereochemistry problems between high proficiency and low proficiency students. The ten problems which were validated by expertise professors were concentrated on geometric isomers, optical isomers, reflection operator, reversion operator and rotation operator.
The findings suggested that the correlation between spatial perception ability and stereochemistry problem solving ability is quite well with r=.647. On average, the best performance of students was in rotation operator. It was due to their past learning experience. The more successful students had the better reasoning strategy. They were more sensitive to the stereo structures, and realized the change of the structure more correctly. The less successful students used worse reasoning strategy and less effective trial-and-error strategy. The latter had wrong recognition on stereo structures, regarding optical isomer as geometric isomer; they also had bad visualizing spatial relationship among atoms
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